Thermostat



(No Model.)

J. H. MALLON.

THERMOSTAT.

No. 405,579.` PatentedJune 18, 1889..

WIZINESSES.

UNITED STATES PATENT OFFICE.

JOHN H. MALliON, OF FRANOESVILLE, INDIANA.

THERMOSTAT.

SPECIFICATION forming part of Letters Patent No. 405,579, dated J' une18, 1889.

Application filed January l2, 1889. Serial No. 296,210. (No model.)

and expansion of a fluid or liquid through the increase or decrease ofthe temperature thereof, which will be understood from the followingdescription.

In the drawings, Figure l is a longitudinal section of my device, oneside of the case being removed. Fig. 2 is a detail view of a part of thedevice, showing the plunger elevated by the expansion of the liuid. Fig.3 is a modification of a top of the tank and nipple. Fig. 4 is a rearview of a modification of the device to which the valve is connected.Fig. 5 is an end view of the same.

In detail, c is an outer case inclosing a tank ,made in bottleshape,with a neck, as shown.

This is intended to hold the fluid or liquid f.`

The top of this tank is closed by a rubber nipple n, having' a flangedrim, which rests upon a shoulder formed about the neck of the tank t.

p is a pipe through which the plunger p moves. The lower end of thispipe has its bore enlarged, forming a recess r to admit the neck of thebottle and its covering, (the nipple,) and this recess is made largerthan the neck of the bottle, in order to permit the nipple, whenextended by the expansion of the fluid, to rise above the top of thetank t, as shown in Fig. 2.. The upper end of this pipe p is shoulderedand fits into the movable y head 71 which is located in the case c aboutof the tank t.

against the flange of the nipple n, holding it securely in place aboutthe shouldered neck By means of this device the regulator may be set sothat it will require a certain degree of temperature in the fluid beforeits expansion will cause the plunger to rise, generally 70o or 80Fahrenheit. The upper part of the plunger-rod is shouldered to receive acoiled spring sj), which works against the under side of the top of thecase, the end of the plunger passing into such top.

w is a wire which is made with a hook at either end, or at both, asshown in Fig. l, for the purpose of connecting the plunger with thevalve to be operated upon. Ordinarily only the lower hook is intended tobe used; but in some cases it may be desirable to connect the valve atthe upper end of such wire, and then it is extended through the upperpart of the-case, as shown in Figs. l and 2.

In Fig. 2 the spring is shown compressed. The iiuid having expanded hasforced the nipple upward, carrying with it the plunger p, and the wirew, being fixed in the plungerrod, is carried up with it, so thatwhatever is attached to either hook of the wire will be operated upon bythe expansion of the fluid. Then the fluid contracts, the force of thespring Sp operates to throw the plunger down in the position shown inFig. 1.

In Fig. 3 is shown a modification of the shape of the nipple. In orderto give greater throw to the plunger the nipple may be made in thisshape and the plunger extended down into the recess formed by the bendin the nipple; but its operation is precisely the same as the form shownin Figs. l and 2.

If desired to hang the device upon the wall, the valve maybe operated bymeans of a pulley and cord, instead of a wire passing through theplunger-rod, and in such case a convenient method of construction isshown in Figs. 4 and 5.

i" is a roller journaled in the sides of the case. br is a bracket fixedto the top of the plunger. 7c are knobs or locking-screws to hold theroller in proper relative position. c is a cord wound about the roller,extending below and connected with the device it is intended to control.As the flange expands it Vforces up the nipple, carrying withit the IOOplunger, and as the plunger rises it carries with it the bracket br andthe roller r', controlling the cord c and operating the valve connectedbelow.

In Fig. 4 the dotted lines show the position of the knobs 7i; when theroller has made about a'quarter-revolution; but in this form of thedevice the limit of vertical movement is about equal to the radius ofthe roller r.

The form of the device shown in Figs. 1,2, and 3 is generally preferablefor controlling the operation of the valve; but in some situations theroller and cord connections shown in Figs. 4 and 5 may be better. Itwill be seen, therefore, that my device consists, practically, of a tankfor holding the liquid, having a rubber cap upon which the plungernormally rests, and the expansion of the liquid serves to force theplunger upward and operate the valve connected to such plunger by meansof wires or other similar devices, and when the temperature of the fluidfalls the plunger will be forced downward by the spring and the valvewill be operated in an opposite direction. If the device is for naturalgas,it should be set within a convenient distance of the iire, so thatas the heat of the iire increases it will raise the liquid to acorresponding degree of temperature, and the rising temperatureoperating the plunger so as to partially close the valve, it regulatesthe supply of gas to the fire, and as the temperature decreases and thatof the iiuid with it the necessary consequence would be that the plungerwill fall and open the valve, thereby supplying more gas to the fire,and thus automatically controlling and making an even temperaturethroughout the room.

What l claim as my invention, and desire to secure by Letters Patent, isthe following, to Wit:

l. In a thermometrical gas regulator, an outer case, a vessel forholding the expansible liquid inclosed therein, an elastic nipplecovering the mouth of such vessel and provided with a flange which restsupon a shoulder formed upon the neck of the vessel, a pipe having anopening to receive the mouth of such vessel, the lower end thereofabutting against the ilanges of the nipple, the upper end of such pipeheld in position by a head movable in the outer case, an adjustablesleeve above such head inclosed in the upper part of such ease foradjusting and securing suclr head in position, a plunger moving in saidpipe shouldered above to receive a coiled spring for creating a downwardpressure upon such plunger, and a rod connected therewith for attachmentto the mechanism to be operated upon, all combined substantially asshown and described.

2. In a thermometrical gas regulator, an outer case c, the vessel t,inclosed therein, the elastic nipple n, closing the mouth of suchvessel, the adjustable pipe p, for holding such nipple in position,thespring-plunger p, moving in such pipe, the wire w, connected to suchplunger and operated thereby, provided with a hook at one or both endsfor connecting to the mechanism to be operated upon, and

y the adjusting-sleeve s, threaded to receive the nut n, held in placebetween the top of the case and the movable head h, all combinedsubstantially as shown and described.

In witness whereof I have hereunto set m hand thisllth day of December,1888.

JOHN H. MALLON.

lVitnesses:

U. CECIL MALLoN,

E. B. GRIFFITH.

